Senior Medical Staff

What makes Medical Equation, Inc. so special?


Partners and co-medical directors, from left, John P. Obermiller, MD, Peter M. Garcia, MD and Brian C. Buck, MD form the Medical Equation™ leadership team for 22 doctors representing 19 specialties.

Click on the Senior Staff Member below for more information.

Physical Medicine and Rehabilitation

Dr. John P. Obermiller is president and medical director of Medical Equation, Inc. based in Austin, Texas. He co-founded the company in 1996, one of the first utilization management services companies of its kind, and has served as a medical director since the company’s inception. Dr. Obermiller, with partners and co-medical directors Dr. Brian C. Buck and Dr. Peter M. Garcia, together form the Medical Equation™ leadership team for 22 doctors representing 19 specialties.

Dr. Obermiller is board certified with the American Board of Physical Medicine and Rehabilitation and is a Fellow of the American Board of Physical Medicine and Rehabilitation. He co-founded Texas Orthopedics Sports and Rehabilitation Associates in 1986 in Austin. A practicing physician for more than 25 years, he maintains a private practice in Austin and is a medical staff member at several Austin area hospitals.

Dr. Obermiller is a Texas Division of Insurance, Division of Workers’ Compensation designated doctor and has held that designation since 1993. With over 20 years in the workers’ compensation and liability claims field, he is a leading expert in compensability evaluation based on the Official Disability Guidelines (ODG). Dr. Obermiller provides expert testimony for contested case hearings and is a sought-after speaker and lecturer. He regularly conducts Texas Department of Insurance certified continuing education courses covering an array of utilization review topics.

He is licensed in the states of California, Colorado, Georgia, Illinois, Mississippi, Nevada, New York, North Carolina, Oklahoma, Tennessee, Texas and Virginia.

After serving in the United States Marine Corps as a C-130 navigator, Dr. Obermiller completed his residency in Physical Medicine and Rehabilitation at the University of Texas Health Science Center at San Antonio and received his Doctorate in Medicine from Texas Tech University School of Medicine in Lubbock, Texas. He received a Bachelor of Science degree in Geology from the University of Texas at Austin. He is regularly listed in Super Doctors® published in Texas Monthly magazine. Dr. Obermiller is an avid outdoorsman, pilot and hunting enthusiast.

Physical Medicine and Rehabilitation

Dr. Brian C. Buck is a medical director of Medical Equation, Inc. based in Austin, Texas, one of the first utilization management services companies of its kind. Dr. Buck, with partners and co-medical directors Dr. John P. Obermiller and Dr. Peter M. Garcia, together form the Medical Equation™ leadership team for 22 doctors representing 19 specialties.

Dr. Buck is board certified with the American Board of Physical Medicine and Rehabilitation and the American Board of Electro-Diagnostic Medicine. He is a Texas Division of Insurance, Division of Workers’ Compensation designated doctor and is a certified Medical Review Officer. Dr. Buck is also board certified with American Board of Quality Assurance and Utilization Review. He is licensed in California, Georgia, New York, Tennessee, Oklahoma and Texas.

He maintains a private practice in Austin, Texas and his work includes workers’ compensation cases, electromyography and neuromuscular disease.

As a Medical Equation™ medical director, Dr. Buck supervises professional staff and procedures. He regularly conducts Texas Department of Insurance certified continuing education courses covering an array of utilization review topics.

Dr. Buck received his Doctorate in Medicine from the University of Texas Medical Branch at Galveston, Texas. He earned his undergraduate degree from Austin College in Sherman, Texas. Dr. Buck has been regularly listed in Super Doctors® published in Texas Monthly magazine and he volunteers with Austin Boy Scout Troop 30.

Orthopedic Surgeon

Dr. Peter M. Garcia is a medical director of Medical Equation, Inc. based in Austin, Texas, one of the first utilization management services companies of its kind. Dr. Garcia, with partners and co-medical directors Dr. John P. Obermiller and Dr. Brian C. Buck, together form the Medical Equation™ leadership team for 22 doctors representing 19 specialties.

Dr. Garcia is board certified in Orthopedic Surgery and is a fellow of the American Academy of Orthopedic Surgeons. He has been in general orthopedic practice in Austin with Texas Orthopedic Sports and Rehabilitation since 1988 and is a medical staff member at several Austin area hospitals. Dr. Garcia is a Texas Division of Insurance, Division of Workers’ Compensation designated doctor. As a Medical Equation™ medical director, Dr. Garcia supervises professional staff and procedures. He regularly conducts Texas Department of Insurance certified continuing education courses covering an array of utilization review topics.

He is licensed in California, Illinois, Mississippi, New York, Tennessee, Colorado, Georgia, Nevada, Oklahoma and Texas.

Dr. Garcia received his Doctorate in Medicine from Texas Tech University School of Medicine in Lubbock, Texas. He completed his orthopedic residency at William Beaumont Army Medical Center and served in the United States Army based at Ft. Hood, Texas. He received a Bachelor of Science degree in Biology from the University of Texas at Austin. Dr. Garcia is regularly listed in Super Doctors® published in Texas Monthly magazine. He also speaks fluent Spanish.